Introduction: As campuses grow denser and academic calendars grow tighter, the question is not just how to build, but how to build without interruption. At IILM University, this challenge took on a structural dimension. Tasked with adding two additional floors to an operational academic building, Rahul Bahl and his team at Krishna Buildestates approached the project not as a conventional extension, but as a carefully orchestrated intervention, where steel became the medium through which continuity, safety, and speed could coexist.
BUILDING WITHIN A LIVING SYSTEM
Unlike greenfield projects, where construction unfolds on an empty canvas, this intervention had to negotiate with an existing, functioning environment. Classrooms remained occupied, circulation pathways active, and the daily rhythm of campus life uninterrupted.
The brief was deceptively simple: expand vertically by two floors. The reality, however, demanded a far more nuanced response. Conventional RCC construction presented immediate limitations. The additional load would have restricted expansion to a single floor, while also increasing construction time and on-site disruption. Steel, by contrast, offered an alternative logic, one that aligned structural efficiency with operational sensitivity.
“The real challenge was not adding space but doing so without disturbing the life already within it.”
THE ENABLER OF POSSIBILITY
The decision to adopt steel was not driven by material preference alone, but by its inherent advantages in retrofit scenarios. Its high strength-to-weight ratio allowed the structure to grow vertically without imposing excessive stress on existing foundations. What RCC could not accommodate, steel made possible, enabling the addition of two full floors instead of one.
Equally critical was speed. In a live campus environment, construction timelines directly influence disruption levels. Steel, through prefabrication and modular assembly, significantly reduced on-site activity, allowing the project to progress with minimal interference.
Components fabricated off-site arrived ready for assembly, transforming construction into a process of precision rather than improvisation.
“Steel allowed us to build faster, lighter, and more precisely while keeping the campus fully operational.”
– Rahul Bahl
RETROFITTING AS STRUCTURAL DIALOGUE
If the new structure represented expansion, the existing structure demanded reinforcement. The success of the project hinged on the ability to integrate the two seamlessly. This required careful strengthening of the existing foundation system, ensuring that it could safely accommodate additional loads without compromising stability.
The introduction of cross steel bracings from the ground to the fourth floor became a defining intervention. These bracings redistributed load paths, enhancing the building’s resistance to both vertical and lateral forces, including seismic and wind actions. Rather than treating the old and new as separate entities, the design allowed them to function as a unified structural system.
PRECISION IN EXECUTION
Execution, in this context, was as critical as design. The use of E350-grade tubular steel sections, fabricated using automated SAW welding, ensured consistency and accuracy across components. High-grade bolted connections replaced conventional on-site welding, reducing risks associated with fire hazards and alignment errors while accelerating assembly. This shift towards prefabrication and mechanised fabrication brought a level of control that is often difficult to achieve in traditional construction methods.
Engineering the Expansion
- Structure: Steel-led vertical extension with RCC base
- Key System: Cross steel bracings for load redistribution
- Material: E350-grade tubular steel sections
- Construction Method: Prefabrication with automated welding
- Connections: High-grade bolted systems for speed and safety
- Flooring: GI deck sheets with screed concrete for reduced load
CONSTRUCTION WITHOUT INTERRUPTION
Perhaps the most compelling aspect of the project lies in what it did not do — it did not disrupt. Construction activities were carefully scheduled around academic operations. High-noise tasks were executed during off-hours. Dust and debris were tightly controlled. Movement of materials was planned to avoid interference with campus circulation.
This level of coordination required more than technical expertise, it demanded a deep understanding of the environment in which the building existed. The project, in essence, adapted itself to the campus, rather than forcing the campus to adapt to it.
“In a live environment, construction must learn to coexist before it can create.”
LIGHTWEIGHT SYSTEMS, LONG-TERM FLEXIBILITY
The use of GI deck sheets with screed concrete introduced a flooring system that balanced durability with lightness. By reducing overall structural load, it contributed to the feasibility of vertical expansion, while also enabling faster construction cycles.
More importantly, this system introduced adaptability, allowing future modifications without significant structural intervention. In institutional environments, where needs evolve continuously, such flexibility becomes invaluable.
A BROADER SHIFT IN INSTITUTIONAL CONSTRUCTION
The IILM University project reflects a larger transition in India’s construction landscape. As educational institutions face increasing pressure to expand within constrained footprints, the need for intelligent retrofit solutions is becoming more pronounced. Steel, with its combination of speed, strength, and adaptability, is emerging as a preferred material for such interventions.
For Rahul Bahl and his team, the project is both a technical achievement and a strategic demonstration of how steel can redefine the way India approaches vertical expansion in operational environments.
“Steel is not just a material choice, it is a strategic decision for building in complex, live environments.”
THE HUMAN DIMENSION OF ENGINEERING
Beyond the structural and technical achievements, the project also reflects a philosophy of collaboration and trust. For Bahl, leadership in construction is not just about delivering projects, but about creating systems that enable teams to innovate and execute with confidence.
With a background that bridges engineering, technology, and business strategy, his approach integrates technical rigour with forward-looking thinking, positioning projects like IILM as benchmarks for future development.
Editor’s Note:
The expansion of IILM University offers an important insight into the future of construction in India, one where growth must occur without disruption, and where new interventions must respect existing systems. What distinguishes this project is not merely its use of steel, but the clarity with which that choice was applied. Steel here is not an alternative, it is an enabler, allowing the project to achieve what conventional systems could not. The ability to build within constraints, to expand without interruption, and to integrate new with old will define the next phase of construction. In that sense, this is not just a project. It is a direction.
